<template>
  <div>
    <div class="list" ref='wrapper'>
      <div>
        <div class="area">
          <div class="title border-topbottom">当前城市</div>
          <div class="btn-list">
            <div class="btn-wrapper">
              <div class="btn">{{this.currtentCity}}</div>
            </div>
          </div>
        </div>
        <div class="area">
          <div class="title border-topbottom">热门城市</div>
          <div class="btn-list">
            <div
            class="btn-wrapper"
            v-for="item of hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
            >
              <div class="btn">{{item.name}}</div>
            </div>
          </div>
        </div>
        <div class="area"
        v-for="(item, key) of cities"
        :key="key"
        :ref="key"
        >
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list"
          v-for="inneritem of item"
          :key="inneritem.id"
          @click="handleCityClick(inneritem.name)"
          >
            <div class="item border-bottom">{{inneritem.name}}</div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  computed: {
    ...mapState({
      currtentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations (['changeCity'])
  },
  watch: {
    letter () {
      const element = this.$refs[this.letter][0]
      this.scroll.scrollToElement(element)
    }
  }
}
</script>
<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      padding-left: .2rem
      font-size: .26rem
      background: #eee
      color: #666
    .btn-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .btn-wrapper
        float: left
        width: 33.33%
        .btn
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
